Resolve lint warnings

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/java/com/zeapo/pwdstore/PasswordFragment.kt

@@ -120,7 +120,7 @@ class PasswordFragment : Fragment() {
 
         val path = requireNotNull(requireArguments().getString(PasswordStore.REQUEST_ARG_PATH))
         model.navigateTo(File(path), pushPreviousLocation = false)
-        model.searchResult.observe(this) { result ->
+        model.searchResult.observe(viewLifecycleOwner) { result ->
             // Only run animations when the new list is filtered, i.e., the user submitted a search,
             // and not on folder navigations since the latter leads to too many removal animations.
             (recyclerView.itemAnimator as OnOffItemAnimator).isEnabled = result.isFiltered

app/src/main/java/com/zeapo/pwdstore/PasswordStore.kt

@@ -170,6 +170,7 @@ class PasswordStore : AppCompatActivity() {
     }
 
     override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
         // If request is cancelled, the result arrays are empty.
         if (requestCode == REQUEST_EXTERNAL_STORAGE) {
             if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

app/src/main/java/com/zeapo/pwdstore/SelectFolderFragment.kt

@@ -57,7 +57,7 @@ class SelectFolderFragment : Fragment() {
 
         val path = requireNotNull(requireArguments().getString(PasswordStore.REQUEST_ARG_PATH))
         model.navigateTo(File(path), listMode = ListMode.DirectoriesOnly, pushPreviousLocation = false)
-        model.searchResult.observe(this) { result ->
+        model.searchResult.observe(viewLifecycleOwner) { result ->
             recyclerAdapter.submitList(result.passwordItems)
         }
     }